import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../models/user.dart';
import '../services/storage_service.dart';
import '../services/api_service.dart';

class AuthState {
  final User? user;
  final bool isLoading;
  final String? error;

  const AuthState({this.user, this.isLoading = false, this.error});

  bool get isLoggedIn => user != null;

  AuthState copyWith({User? user, bool? isLoading, String? error}) {
    return AuthState(
      user: user ?? this.user,
      isLoading: isLoading ?? this.isLoading,
      error: error,
    );
  }
}

class AuthNotifier extends StateNotifier<AuthState> {
  AuthNotifier() : super(const AuthState()) {
    _checkLoginStatus();
  }

  Future<void> _checkLoginStatus() async {
    await storageService.init();
    final user = storageService.getUser();
    if (user != null) {
      state = state.copyWith(user: user);
    }
  }

  Future<void> login(String phone, String password) async {
    state = state.copyWith(isLoading: true, error: null);
    try {
      final response = await apiService.login(phone, password);
      final user = User.fromJson(response['user']);
      await storageService.saveUser(user);
      state = state.copyWith(user: user, isLoading: false);
    } catch (e) {
      state = state.copyWith(isLoading: false, error: e.toString());
    }
  }

  Future<void> logout() async {
    await storageService.clearUser();
    state = const AuthState();
  }
}

final authProvider = StateNotifierProvider<AuthNotifier, AuthState>((ref) {
  return AuthNotifier();
});